I suggest re-phrasing as follows:

You can configure NServiuceBus endpoints to use a specific transport by:

1. Setting a connection string in the endpoint's configuration file 
* Installing the relevant transport's NuGet package

<Here I think there should be a list of nuget packages for each transport; e.g. https://www.nuget.org/packages/NServiceBus.Azure etc.>

All the transports connection string can be configured in the application configuration file using the `NServiceBus/Transport` connection string name. Following is a sample list of connection strings for the above transports: